Psalm 119:105: "Your word is a lamp to my feet and a light to my path."
1 Peter 1:10-12: "10 Concerning this salvation, the prophets who prophesied about the grace that was to be yours searched and inquired carefully, 11 inquiring what person or time the Spirit of Christ in them was indicating when he predicted the sufferings of Christ and the subsequent glories. 12 It was revealed to them that they were serving not themselves but you, in the things that have now been announced to you through those who preached the good news to you by the Holy Spirit sent from heaven, things into which angels long to look."
Isaiah 51:4: "'Give attention to me, my people, and give ear to me, my nation; for a law will go out from me, and I will set my justice for a light to the peoples.'"
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Psalm 119:105 appears in the first verse, especially in the first and last lines: "O God of light, Your Word, a lamp unfailing, / Shall... guide our footsteps to the perfect day."
The passage from 1 Peter 1 is the basis for the second half of the second verse and the third verse.
Isaiah 51:4 overlaps a bit with the light imagery in Psalm 119:105, but it also appears at the beginning of the third verse: "Undimmed by time, those words are still revealing / To sinful hearts Your justice and Your grace."
